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Related Experiment Video

Updated: Sep 24, 2025

A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis
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Photosensitivity reaction induced by finasteride.

Takayuki Yamada1

  • 1Asunaro Clinic Takasaki City Japan.

Journal of General and Family Medicine
|May 5, 2022
PubMed
Summary

A patient developed a facial rash due to finasteride-induced photosensitivity. Stopping the medication led to significant improvement of the desquamating eruption.

Area of Science:

  • Dermatology
  • Pharmacology

Background:

  • Alopecia androgenetica (male-pattern baldness) is a common condition often treated with oral finasteride.
  • Drug-induced photosensitivity is an adverse reaction to medications, leading to skin reactions upon sun exposure.

Observation:

  • A patient presented with a two-month history of a desquamating facial eruption.
  • The patient had been taking oral finasteride for four months for alopecia androgenetica.

Findings:

  • The facial rash was determined to be a manifestation of drug-induced photosensitivity to finasteride.
  • Discontinuation of finasteride for two weeks resulted in marked improvement of the facial rash.

Implications:

  • Finasteride can cause photosensitivity reactions, presenting as facial rashes.
Keywords:
finasteridephotosensitivity reaction

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  • Physicians should consider drug-induced photosensitivity in patients presenting with unexplained skin eruptions while on finasteride.
  • Discontinuation of the offending agent is an effective management strategy for finasteride-induced photosensitivity.